Wbehch



E. GRIESB'AUM.

WRENCH.

APPLICATION FILED APR-11.1919.

1,3 1 9,701 Patented 0m. 72s, 1919.

2 SHEETS-SHET 2.

INVENTOR. 1f. @wesanam.

BY Z7344 ATTORNEY.

UNITED STATES PATENT OFFICE.

ERWIN GRIESBAUM, OF ST. LOUIS, MISSOURI.

WRENCH.

Specification of Letters Patent.

Patented Oct. 28, 1919.

- Application filed April 11, 1919. Serial No. 289,280.

To all whom it may concern.

Be it known that I, ERWIN a citizen of the United States, residing in the city'of St. Louis and State of Missouri, have invented new' and useful Improve ments in l Vrenches, of which the following is a specification, reference being had to the accompanying drawings. 7

This invention pertains to quick acting wrenches of the sliding jaw type. The primary object is to produce a quick acting wrench with a rear sliding jaw whlch may be instantly adjusted to position against the work and quickly locked into such position.

A secondary object is to produce such wrench in a simple, practical and efficient form, ofcomparatively few parts and which may be cheaply placed upon the market.

In the drawings, Figure 1 shows a side elevation of such wrench.

Fig. 2 is a top plan View.

Fig. 3 is a bottom plan view.

Fig. 4 is a top plan view of the front jaw and rearwardly extending handle, the other elements being removed.

Fig. 5 is a top plan View of the rear jaw.

Fig. 6 is a bottom plan view of the rear jaw.

Fig. 7 is a detail of the locking shank, cam and thumb lever for the rear jaw.

GRIEBBAUM,

Fig. 8 is a detail of the upper sliding dog.

Referring more particularly to the drawings, my invention in its preferred construction consists of a front jaw 1 with a rigidly attached backwardly extended handle 2 projecting backwardly at right angles, of course, to the jaw. Through the handle 2 is formed parallel tothe sides thereof an elongated slot 8, piercing the handle through rom top to bottomv in alinement with the front jaw 1. A sliding rear jaw 1 is provided with a backwardly extending shank 5, along the upper surface of which a con caved guide-way 6 is formed adapted to re ceive and slidingly engage the lower edge 7 of the handle 2, said lower edge being formed correspondingly convex. A hole 8 is pierced through the shank of said rear jaw from top to bottom and adapted to fall into alinement with the elongated slot 3 aforesaid of the handle 2. Complementary to the said rear jaw 41- and slidingly mounted along the top edge 9 of the handle 2 is the sliding dog 10, same likewise being formed with a concaved under surface 11, adapted to slidingly engage the said upper 23 is provided at the base edge 9 of said handle 2. This dog 10 is likewise pierced with a central hole 12 in alinement with the hole 8 formed through the shank 5 of the rear jaw and said elongated slot 3 through the handle. A locking element 13 is provided, consisting of a shaft 14 adapted to pass upwardly through the hole 8 in the shank of the rear jaw, the slot 3 in the handle, and the hole 12 in the upper "dog, and a locking cam 15 and a thumb lever 16 all rigidly attached to or formed integrally with said shank. A hole 1 is pierced transversely through the upper end of the shaft 14: and a cotter pin 18 adjusted therethrough to lock the several elements in place upon the wrench. The lower mouth of the hole 8 in the shank of the rear jaw is reamed out funnel-like as shown at 19 but a rising, graduated shoulder 20 is left slightly upstanding from the wall of the hole, same ending abruptly at the highest point 21 whence it falls again to the lowest point 22. A cone-like cam of the shank -of the locking member aforesaid and this conelike cam has a rising shoulder 24 complementary and reversed to the shoulder 20 aforesaid, so that the abrupt sides of said shoulders are adapted to abut one against the other on the reversed movement of the thumb lever 16 and shaft 14. Upon the opposite or looking movement or turn of said thumb lever, however, the graduated shoulders 20 and 24 of the cone cam and the beveled hole turning one upon the other, operate to draw the shaft 14 downward] causing the upper sliding dog 10 to be locked into position at the top of the wrench. A washer 25 is mounted over the upper end of the shaft 14 between the cotter pin 18 and the dog 10. If preferred a thread 26 may be cut on the upper end of the shaft 14, and a lock nut 27 mounted thereon, thus rendering the shaft 14 readily adjustable. In operation the rear jaw is thrown loose by merely turning the thumb lever backwardly or anti-clockwise, after which the said jaw is moved into position against the work. By then merely turning the thumb lever clockwise in the opposite direction, said rear jaw is locked firmly into its set position through the operation of the ec- Cir understood same may be varied in minor details, not departing from the sp rlt of my invention as defined in the appended claim.

What I claim to be new and patentable is:

A quick acting wrench comprising a front jaw having a. rigid backwardly extending handle, formed with an elongated longitudinal slot disposed in parallel relation with the sides of the handle, a rear jaw having a rigid backwardly extending shank formed with a concave upper surface adapted to slidably engage with said handle and with a transverse aperture disposed in alinement with the slot in said handle, the inner end of said aperture being reamed out funnellike to provide a rising cam-like shoulder on the side wall thereof, a dog mounted on the upper edge of the handle, said dog having a concave under surface adapted to Copies of this patent may be obtained for slidably engage the upper edge of the handle and formed with a transverse aperture disposed in alinement with the slot in the handle and an integral lock-shaft extending through the shank, handle and dog,

respectively, and locked to'the latter, said lock-shaft formed with an eccentric-conecami and thumb lever at its lower end, said eccentric conecam engaging said reamed hole in the shank of the rear jaw and'having a rising co-acting with the shoulder in said reamed hole for drawing the shaft and dog downwardly by turning the thumb lever and thus locking the rear jaw in set position.

ERWIN GRIESBAUM. Witnesses: I

A. K. DOHLE, M. L. GERAU.

five cent: each, by addressing the Commissioner 0! Patents,

Washington, D. 0."

shoulder complementary to and 

